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Method and system for soil remediation

A soil remediation and chemical liquid technology, which is applied in the field of environmental engineering, can solve problems such as chemical diffusion, increase remediation costs, and increase remediation engineering operations, and achieve the effects of increasing the diffusion radius, reducing potential safety hazards, and increasing the scope of application.

Active Publication Date: 2022-05-17
北京环丁环保大数据研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above measures not only increase the repair work, but also cause high energy consumption, and excessive pressure will cause slurry or excessive cracks, causing the agent to spread to non-target areas, increasing the cost of repair, and increasing construction safety hazards

Method used

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  • Method and system for soil remediation
  • Method and system for soil remediation
  • Method and system for soil remediation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] figure 1 It is a flow chart of a soil remediation method provided by Embodiment 1 of the present invention. This embodiment is applicable to the situation of remediating polluted soil. The method can be performed by a soil remediation system, which includes a pulse generating device and Injection device, correspondingly, the soil remediation method specifically includes the following steps:

[0020] S110, the pulse generating device performs cut-off control on the repair liquid according to the set pulse frequency.

[0021] Among them, the pulse generating device is a device capable of controlling the intermittent flow cut-off of the repairing liquid. By performing intermittent cut-off control on the repairing liquid, the repairing liquid can be output according to the set time interval, that is, according to the set pulse frequency is output.

[0022] The cut-off control is to control the intermittent conduction of the repairing liquid. By controlling the intermitten...

Embodiment 2

[0034] figure 2 It is a flow chart of a soil remediation method provided by Embodiment 2 of the present invention. This embodiment is optimized on the basis of the above embodiments. The method can be executed by a soil remediation system, which includes: a pressure control device, Pulse generating device and injection device, correspondingly, the soil remediation method specifically includes:

[0035] S210. The pressure control device controls the restoration medicine liquid to form a medicine flow whose pressure value changes within a set range.

[0036]Wherein, the pressure control device is a device capable of generating a set pressure, and the pressure control device is connected with the pulse generating device, so as to realize the delivery of the repairing liquid after pressure treatment to the pulse generating device. The pressure control device can adjust its working pressure according to the formation permeability and the maximum pressure bearing capacity of the d...

Embodiment 3

[0051] image 3 It is a schematic structural diagram of a soil remediation system provided by Embodiment 3 of the present invention. The soil remediation system is used to inject the remediation liquid into the target stratum in the manner of pulse injection, so that the remediation liquid completes the restoration of the contaminated area through the oxidation / reduction reaction. repair, such as image 3 As shown, the repair system includes: a pulse generating device and an injection device, wherein,

[0052] The pulse generating device is used to cut off the repair liquid according to the set pulse frequency.

[0053] The injecting device is used for injecting the repairing liquid controlled by interception into the target formation.

[0054] Among them, the pulse frequency is set according to the permeability of the target formation. Because under a certain pressure, the higher the pulse frequency, the lower the pulse energy generated, and after the repair liquid is inje...

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Abstract

The embodiment of the present invention discloses a soil restoration method and system. The method is applied to a soil restoration system. The soil restoration system includes a pulse generating device and an injection device, wherein the method includes: The pulse frequency is used for closure control; the injection device injects the repair liquid after closure control into the target formation, wherein the pulse frequency is set according to the permeability of the target formation. In the embodiment of the present invention, the repairing liquid is controlled by shutting off flow, so that the repairing liquid generates pulse energy and propagates in the target formation. If the formation is in an unsaturated state, the pulse energy can increase the soil permeability of the target formation, so that the remediation liquid can fully contact with the pollutants, and reduce the priority channels such as large pores in the formation during the injection process. As the soil moisture content increases, the formation tends to When saturated, the pulse energy can make the repair liquid penetrate farther. It not only reduces the construction cost, but also reduces the safety hazards of construction.

Description

technical field [0001] Embodiments of the present invention relate to environmental engineering technology, and in particular to a method and system for soil remediation. Background technique [0002] In recent years, with the adjustment of the urban industrial structure and the implementation of policies such as leaving the city and entering the park, most of the polluted sites of decommissioned industrial enterprises are located in the main urban area, and there are relatively large environmental safety hazards and human health risks. In particular, volatile and semi-volatile organic pollutants and soluble heavy metals (hexavalent chromium) will migrate from unsaturated areas to deep saturated areas, posing a threat to groundwater resources. [0003] Compared with other technologies, the current in-situ chemical oxidation / reduction repair technology (ISCO / ISCR) has the advantages of high removal efficiency, short repair period, easy control of secondary pollution, and low ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08
CPCB09C1/08B09C2101/00
Inventor 石丕星朱焰黄珏瑛林斯杰
Owner 北京环丁环保大数据研究院
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